A strong dog is:
1, various working dogs such as mastiff, sled dog, boxer, Du Binquan, Great Dane, Great White Bear, Newfoundland, Komondo, Rottweiler, Saint Bernard, Samoyed and German Shepherd.
2. Afghan hounds, Bashan hounds, learning hounds, Russian shepherds, fox hounds, Lingti, deer hounds, Weimar hounds, boeing da hounds, Bessinger hounds and other hounds.
3. Terriers such as Bering Terrier, Border Terrier, Bull Terrier, Kelly Blue Terrier and Staffordshire Terrier.
4. Non-sports dogs such as pit bull, bulldog, Song Shiquan and Malaysian.
5, Tosa, Akita, Said and other types of dogs.